1-amino-4-[[4-[[3-[(2-chloroethyl)sulphonyl]benzoyl]methylamino]-2-sulphophenyl]amino]-9,10-dihydro-9,10-dioxoanthracene-2-sulphonic acid, sodium salt

2-Anthracenesulfonic acid, 1-amino-4-[[4-[[3-[(2-chloroethyl) sulfonyl]benzoyl]methylamino]-2-sulfophenyl ]amino]-9,10-dihydro-9,10-dioxo-, sodium salt